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Current system
21415-7723
BLM 6
Nu Oct


Nearby doubles
28' : 21495-7717
I 1050

36' : 21366-7652
KPP2099

37' : 21475-7754
DAM 661

40' : 21477-7759
LDS6362AB

45' : 21549-7720
HDS3117AB

50' : 21294-7655
KPP 494

61' : 21345-7627
KPP2244

69' : 22006-7657
TDT3289

78' : 21364-7608
TDT3054

79' : 21475-7839
UC 4566

79' : 21510-7612
HDS3112

81' : 21534-7835
I 672

104' : 21457-7541
KPP4246

110' : 21582-7901
HDS3122

127' : 21503-7521
FAH 2

140' : 21593-7519
TDT3277

155' : 21529-7454
HJ 5295

161' : 21334-8002
HJ 5262

169' : 21543-7441
KPP4255

173' : 21222-8007
LDS 736

178' : 21376-7426
UC 4513

190' : 21479-7414
HJ 5287

196' : 21540-8036
HJ 5289

197' : 21217-7420
B 2493

199' : 21531-7409
KPP3055

202' : 21318-7405
UC 4484



Selections
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Binary Systems
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Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21415-7723 BLM 6 (Nu Oct)

 
 
21h 41m 28.65s -77° 23' 24.1" P.A. 331.00 sep 0.1 mag 3.73, Sp K1III dist. 21.2 pc (69.15 l.y.)
 
 
Coord 2000 21415-7723 Discov num BLM   6 Comp Coord arcsec 2000 21 41 28.65 -77 23 24.1
Date first 1976 Date last 1976 Obs 1
Pa first 331 Pa last 331 P.A. Now (θ) 331°
Sep first 0.1 Sep last 0.104 Sep. Now (ρ) 0.104"
Mag pri 3.73 Mag sec delta mag (ΔM) Spectral class K1III (yellow-orange)
Pri motion ra +074 Sec motion ra
Pri motion dec -107 Sec motion dec
Notes N X O (See Notes, Dubious double, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Nu Oct Constellation Octans SAO 257948 HIP 107089
Tycho2 9478-01483-1 Gaia DR2 6356375508717699584 HD 205478 HR 8254
GC 30289 GL Gl 835.1 CP CP-77 1510 Bayer Nu Octantis
Bayer name Nu Oct FK5 810 Distance 21.2 Distance ly 69.15
Bayer greek ν Oct
 
 
ORBITAL ELEMENTS
 
 
Period (P)2.84y Periastron (T)1906.471y Semi-major axis (a)0.052a
Eccentricity (e)0.25 Inclination (i)65° Longitude of periastron (ω)37°
Node (Ω)118° Notesn ReferenceAld1939b
Equinox Last observation1938 Grade9(1=Definitive, 9=Indet.)
label theta rho
2000 116.6 0.041
2001 291.5 0.056
2002 345.1 0.033
2003 131.8 0.035
2004 298.0 0.061
2005 11.9 0.026
2006 159.8 0.023
2007 303.9 0.062
2008 49.3 0.025
2009 221.4 0.019
2010 310.0 0.059
2011 79.9 0.031
2012 263.6 0.030
2013 317.1 0.053
2014 99.2 0.038
2015 280.3 0.044
2016 326.4 0.045
2017 113.3 0.041
2018 289.6 0.054
2019 340.4 0.036
2020 127.5 0.037
2021 296.5 0.060
2022 3.9 0.027
2023 150.3 0.026
2024 302.4 0.062
2025 39.8 0.024
2026 204.4 0.018
2027 308.4 0.060
2028 73.5 0.029
2029 256.7 0.027
2030 315.1 0.055


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds21415-7723r.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21415-7723 BLM 6 (Nu Oct) : NOTES
 
 
discov_num notes refcode
BLM 6 Astrometric orbit by Alden (1939) used P, T, e taken from the Ald1939b
spectroscopic orbit by Colacevich (1935). Not reinvestigated since. Cla1935
Speckle companion not real.
nu Oct.
 
 
REFERENCES
 
 
refcode metd author reference
Ald1939b orb - Alden, H.L. 1939AJ.....48...81A
Ald1939b AJ 48, 81, 1939
Cla1935 - Colacevich, A. 1935PASP...47...87C
Cla1935 PASP 47, 87, 1935
 
 
DISCOVERER
 
 
idgroup discov author
1 BLM Morgan, B.L., Beddoes, D.R., Scaddan, R.J. & Dainty, J.C.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21415-7723 BLM 6 1976 1 331 0.1 3.73   NO 214128.47-772322.1

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 21415-7723 BLM 6 (Nu Oct) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21415-7723 BLM 6 (Nu Oct) : MEASURES
 
 
No records found.

 
 
WDS 21415-7723 (Nu Oct) : VIRTUAL EYEPIECE
 
 

21415-7723 BLM 6A mag 3.73 Sp K1III 21415-7723 BLM 6B sep 0.1 P.A. 353.10 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 21415-7723 (Nu Oct) : ALADIN DSS IMAGE @ 21h 41m 28.65s -77° 23' 24.1"
 
 
 
 
WDS 21415-7723 BLM 6 (Nu Oct) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21415-7723 BLM 6 distance=0' 21495-7717 I 1050 distance=28' 21366-7652 KPP2099 distance=36' 21475-7754 DAM 661 distance=37' 21477-7759 LDS6362AB distance=40' 21477-7759 LDS6362AC distance=40' 21549-7720 HDS3117AB distance=45' 21549-7720 SKF 106AC distance=45' 21294-7655 KPP 494 distance=50' 21345-7627 KPP2244 distance=61' 22006-7657 TDT3289 distance=69' 21364-7608 TDT3054 distance=78' 21475-7839 UC 4566 distance=79' 21510-7612 HDS3112 distance=79' 21534-7835 I 672 distance=81' 21457-7541 KPP4246 distance=104' 21582-7901 HDS3122 distance=110' 21503-7521 FAH 2 distance=127' 21593-7519 TDT3277 distance=140' 21529-7454 HJ 5295 distance=155' 21334-8002 HJ 5262 distance=161' 21543-7441 KPP4255 distance=169' 21222-8007 LDS 736 distance=173' 21376-7426 UC 4513 distance=178' 21479-7414 HJ 5287 distance=190' 21540-8036 HJ 5289 distance=196' 21217-7420 B 2493 distance=197' 21531-7409 KPP3055 distance=199' 21318-7405 UC 4484 distance=202' 21509-7403 TDT3189 distance=204' 21312-7401 UC 4483 distance=206' 22000-7407 B 2499 distance=208' 21422-8057 TDT3116 distance=214' 21306-7351 TDS1131 distance=217' 21533-7344 TOK 214 distance=225' 21265-7338 DEA 16 distance=232' 21540-7334 UC 4593 distance=235' 21328-7332 HJ 5268 distance=235' 21385-8121 NSN 428 distance=238' 21263-7330 HEI 594 distance=240' 21506-7325 TDT3188 distance=242' 21528-8124 UC 4588 distance=243' 21255-8138 DEA 494 distance=259' 21232-8150 TDT2937 distance=272' 21257-8201 TDT2957 distance=281' 21478-7241 HEI 597 distance=284' 21561-7235 HJ 5297 distance=296' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 21415-7723 BLM 6 331 0.1
Show 21495-7717 I 1050 87 2.9 28
Show 21366-7652 KPP2099 105 16.9 36
Show 21475-7754 DAM 661 195 1.9 37
Show 21477-7759 LDS6362 AB 132 1.7 40
Show 21477-7759 LDS6362 AC 249 7.7 40
Show 21549-7720 HDS3117 AB 119 2.1 45
Show 21549-7720 SKF 106 AC 311 7.6 45
Show 21294-7655 KPP 494 194 3.7 50
Show 21345-7627 KPP2244 53 18.6 61
Show 22006-7657 TDT3289 212 3.5 69
Show 21364-7608 TDT3054 225 1.5 78
Show 21475-7839 UC 4566 14 35.6 79
Show 21510-7612 HDS3112 349 1.2 79
Show 21534-7835 I 672 295 17.4 81
Show 21457-7541 KPP4246 108 1.3 104
Show 21582-7901 HDS3122 340 0.1 110
Show 21503-7521 FAH 2 204 14.5 127
Show 21593-7519 TDT3277 157 0.5 140
Show 21529-7454 HJ 5295 203 21.6 155
Show 21334-8002 HJ 5262 92 24.2 161
Show 21543-7441 KPP4255 121 1.9 169
Show 21222-8007 LDS 736 2 134.2 173
Show 21376-7426 UC 4513 32 30.1 178
Show 21479-7414 HJ 5287 319 5.3 190
Show 21540-8036 HJ 5289 47 16.9 196
Show 21217-7420 B 2493 160 0.4 197
Show 21531-7409 KPP3055 11 1.4 199
Show 21318-7405 UC 4484 345 40.3 202
Show 21509-7403 TDT3189 156 0.9 204
Show 21312-7401 UC 4483 336 46.7 206
Show 22000-7407 B 2499 358 1.9 208
Show 21422-8057 TDT3116 98 0.6 214
Show 21306-7351 TDS1131 303 0.9 217
Show 21533-7344 TOK 214 113 0.9 225
Show 21265-7338 DEA 16 329 84.9 232
Show 21540-7334 UC 4593 2 25.6 235
Show 21328-7332 HJ 5268 230 14.3 235
Show 21385-8121 NSN 428 86 7.2 238
Show 21263-7330 HEI 594 234 0.7 240
Show 21506-7325 TDT3188 24 0.5 242
Show 21528-8124 UC 4588 186 16.9 243
Show 21255-8138 DEA 494 124 217.5 259
Show 21232-8150 TDT2937 182 3.0 272
Show 21257-8201 TDT2957 140 0.4 281
Show 21478-7241 HEI 597 321 0.2 284
Show 21561-7235 HJ 5297 317 8.6 296

 
 
WDS 21415-7723 : COMPONENTS
 
 
  A
B pa=353.1°
sep=0.09"
 
 
21415-7723 A
 
 
Componente originario normalizzato AB Name Nu Oct Coord arcsec 2000 214128.65-772324.1 Mag 3.73
Spectral class K1III (yellow-orange) PmRA 74.00 PmDE -107.0
CCDM
Ccdm 21415-7723 RComp Comp A Note1
Note2 @ Discov num DRAs -1.45 DDEs -24.2
R dRAs 5 Year Theta Rho
Obs 2 Vmag 3.8 Sp K0 PmNote *
PmRA 45 PmDE -240 Dm number -77 1510 Cat1 CPD
Name2 257948 Cat2 SAO HD 205478 M HD
ADS BDS M ADS BDS N IDS IDS 21304S7750A
HIC 107089
 
 
21415-7723 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 214128.65-772324.0 SAO 257948 HIP 107089
Tycho2 9478-01483-1 HD 205478 HR 8254 GC 30289
CP CP-77 1510 FK5 810 Calc delta mag 3.73 Calc coord yes
Tycho2
Tycho2 9478-01483-1 Pflag X RAmdeg DEmdeg
PmRA PmDE E RAmdeg E DEmdeg
E pmRA E pmDE EpRAm EpDEm
Num Q RAmdeg Q DEmdeg Q pmRA
Q pmDE BTmag 5.019 E BTmag 0.014 VTmag 3.841
E VTmag 0.009 Prox 999 TYC T HIP 107089
CCDM RAdeg 325.36866917 DEdeg -77.38948861 EpRA 1990 1.64
EpDE 1990 1.65 E RAdeg 3.2 E DEdeg 3.2 Posflg
Corr 0.1
SAO
SAO 257948 DelFlag RA1950 PmRA1950 0.0176
DE1950 PmDE1950 -0.239 Vmag 3.7 SpType K0
Double code Source 74 CatNum 810 DM CP-77 1510
DMcomp BDsup HD 205478 M HD 0
GC 30289 RA1950rad 5.65485699 DE1950rad -1.35461904 PmRA2000 0.0155
PmDE2000 -0.242
Hipparcos
Catalog H HIP 107089 Proxy RAhms 21 41 28.47
DEdms -77 23 22.1 Vmag 3.73 VarFlag R Vmag H
RAdeg 325.369 DEdeg -77.3895 AstroRef Plx 47.22
CCDM 21415-7723 N CCDM I Nsys 1 Ncomp 1
MultFlag X Source Qual M HIP
Theta Rho HD 205478 BD
CD CP CP-77 1510 Dm number -77 1510 VIred 0.98
SpType K0III R SpType Coord arcsec 2000 214128.47-772322.1
Hipparcos 2
HIP 107089 Sn 1 So 2 Nc 1
RArad 5.6787539579 DErad -1.350700923 Plx 47.17 PmRA 66.41
PmDE -239.1 E RArad 1.57 E DErad 1.44 E Plx 1.93
E pmRA 2.02 E pmDE 1.62 Hpmag 3.8981 E Hpmag 0.0004
SHp 0.004 VA 0 BV 1.008 E BV 0.003
VI 0.98
CCDM
Ccdm 21415-7723 RComp Comp B Note1
Note2 Discov num BLM DRAs DDEs
R dRAs Year 1976 Theta 331 Rho 0.1
Obs 1 Vmag Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 21304S7750B
HIC 107089